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Browsing by Author "Uys, H"

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  • Konrad, T; Uys, H (American Physical Society, 2012-01)
    Unsharp measurements allow the estimation and tracking of quantum wave functions in real time with minimal disruption of the dynamics. Here we demonstrate that high-fidelity state monitoring, and hence quantum control, is ...
  • Bassa, H; Goyal, SK; Choudhary, SK; Uys, H; Diósi, L; Konrad, T (American Physical Society, 2015-09)
    The authors utilize a discrete (sequential) measurement protocol to investigate quantum process tomography of a single two-level quantum system, with an unknown initial state, undergoing Rabi oscillations. The ignorance ...
  • Uys, H; Biercuk, M; Van Devender, AP; Bollinger, JJ (SAIP 2010, 2010-09)
    The authors study pulse sequences that dynamically decouple 9Be+ ions from their decohering environment. The noise environment the ions see is artificially synthesized to emulate a variety of physical systems. By incorporating ...
  • Botha, N; Botha, L; Du Plessis, A; Uys, H; Schoewer, H (2010-10)
    The design of the pulse shaping setup as well as factors taken into account in choosing a specific setup will be discussed. We investigate the generation of simple shaped pulses to test our pulse shaper setup. Difference ...
  • Uys, H; Amini, JM; Wesenberg, JH; Seidelin, S; Britton, J; Bollinger, JJ; Leibfried, D; Ospelkaus, C; Van Deventer, AP; Wineland, DJ (SAIP 2010, 2010-09)
    The design, fabrication and preliminary testing of a chipscale, multi-zone, surface electrode ion trap is reported. The modular design and fabrication techniques used are anticipated to advance scalability of ion trap ...
  • de Clercq, L; Botha, L; Uys, H; Du Plessis, A; Rohwer, E (2010-09)
    Coherent control of the upper vibrational level populations in the electronic ground state of a polyatomic molecule was simulated. Results indicate that selective excitation of a specific upper state level is possible
  • De Clercq, L; Botha, L; Uys, H; Du Plessis, A; Rohwer, E (SAIP 2010, 2010-09)
    Coherent control of the upper vibrational level populations in the electronic ground state of a polyatomic molecule was simulated. Results indicate that selective excitation of a specific upper state level is possible.
  • Sawyer, BC; Britton, JW; Keith, AC; Joseph Wang, CCJ; Freericks, JK; Uys, H; Biercuk, MJ; Bollinger, JJ (American Physical Society, 2012-05)
    We demonstrate spectroscopy and thermometry of individual motional modes in a mesoscopic 2D ion array using entanglement-induced decoherence as a method of transduction. Our system is a 400 µm-diameter planar crystal of ...
  • Madigoe, RJ; Botha, LR; Uys, H; Rohwer, EG; Smit, A (2012-10)
    According to a theoretical analysis, the control landscape of many quantum control problems has a very favourable topology regardless of the detailed nature of the Hamiltonian, provided that one has full control of the ...